BR7401879D0 - Aparelho e dispositivo intercomunicadores e processo para a sua realizacao - Google Patents

Aparelho e dispositivo intercomunicadores e processo para a sua realizacao

Info

Publication number
BR7401879D0
BR7401879D0 BR741879A BR187974A BR7401879D0 BR 7401879 D0 BR7401879 D0 BR 7401879D0 BR 741879 A BR741879 A BR 741879A BR 187974 A BR187974 A BR 187974A BR 7401879 D0 BR7401879 D0 BR 7401879D0
Authority
BR
Brazil
Prior art keywords
achievement
intercommunicating
intercommunicating device
Prior art date
Application number
BR741879A
Other languages
English (en)
Inventor
J Thompson
W Clarke
J Gale
Original Assignee
Bell Northern Research Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bell Northern Research Ltd filed Critical Bell Northern Research Ltd
Publication of BR7401879D0 publication Critical patent/BR7401879D0/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
BR741879A 1973-03-12 1974-03-12 Aparelho e dispositivo intercomunicadores e processo para a sua realizacao BR7401879D0 (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA165,801A CA976677A (en) 1973-03-12 1973-03-12 Loudspeaking communication terminal apparatus and method of operation

Publications (1)

Publication Number Publication Date
BR7401879D0 true BR7401879D0 (pt) 1974-11-19

Family

ID=4096059

Family Applications (1)

Application Number Title Priority Date Filing Date
BR741879A BR7401879D0 (pt) 1973-03-12 1974-03-12 Aparelho e dispositivo intercomunicadores e processo para a sua realizacao

Country Status (11)

Country Link
AU (1) AU476504B2 (pt)
BE (1) BE812212A (pt)
BR (1) BR7401879D0 (pt)
CA (1) CA976677A (pt)
FR (1) FR2221885B1 (pt)
GB (1) GB1444828A (pt)
IE (1) IE40708B1 (pt)
IT (1) IT1025013B (pt)
NL (1) NL169809C (pt)
SE (1) SE400148B (pt)
ZA (1) ZA741555B (pt)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178548A (en) * 1976-10-04 1979-12-11 Geraldine E. Thompson Voice actuated mobile radio
DE2842369A1 (de) * 1978-09-28 1980-04-10 Siemens Ag Schaltungsanordnung fuer eine sprachgesteuerte lautfernsprechstation in fernmelde-, insbesondere fernsprechanlagen
GB2174578B (en) * 1985-05-04 1988-11-09 Stc Plc Loud speaking telephone
FI73341C (fi) * 1985-08-06 1987-09-10 Outel Oy Mellanfoerstaerkare som anvaends i tvaoledningsfoerbindelser i ett valbart telefonnaet samt foerfarande foer reglering av dess foerstaerkning.
CA1291837C (en) * 1987-07-15 1991-11-05 Juro Ohga Electronic telephone terminal having noise suppression function

Also Published As

Publication number Publication date
FR2221885B1 (pt) 1982-04-23
ZA741555B (en) 1975-02-26
AU476504B2 (en) 1976-09-23
DE2411501A1 (de) 1974-10-10
NL169809B (nl) 1982-03-16
FR2221885A1 (pt) 1974-10-11
SE400148B (sv) 1978-03-13
IT1025013B (it) 1978-08-10
AU6657974A (en) 1975-09-18
NL7403286A (pt) 1974-09-16
GB1444828A (pt) 1976-08-04
BE812212A (fr) 1974-07-31
IE40708B1 (en) 1979-08-01
NL169809C (nl) 1982-08-16
DE2411501B2 (de) 1975-08-21
CA976677A (en) 1975-10-21

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